I have a PC with JUST Win8 RP on it. That's it. No Win7 or any other previous version of Windows anywhere on the hard drive. Now, my question is: how do I upgrade to Win8? I know the $40 upgrade applies to previewers like myself, however I read that in order for that to work you have to have an underlying Win7 or older license (which obviously I don't). Now, I would have no problem with buying the full version of Win8 for the full price and just doing a clean install, but now it's being said that MS will not sell a full version of Win8 so I can do that. I've heard that they'll be selling a "system builder" version but I have no idea what that even is.

Do you have an old version of Windows Vista laying around? You could use that product key as your upgrade. If not then just download that system builder version. It will probably cost you a bit more than the upgrade.

Do you have an old version of Windows Vista laying around? You could use that product key as your upgrade. If not then just download that system builder version. It will probably cost you a bit more than the upgrade.

This is what I'm doing. I have a copy of XP and a copy of Vista lying around I plan on doing this with.